Regulation of dynamos



(No Model.) 2 Sheets-Sheet 1. E. W. RICE, Jr.

REGULATION OF DYNAMOS.

No. 397,613. Patented Feb. 12, 1 889.

WITNESSES INVENTOR.

ATTORNEYS,

(No Model.) 2 Sheets-Sheet 2. E. W. RICE, Jr.

REGULATION OF DYNAMOS No. 397,613. Patented Feb. 12, 1889.

' WITNESSES: INVENTOR. \QWL 514625217 R106, J2.

1A4 i 1 I, BY

- I ATTORNEYS.

PATENT OFFICE.

EDWIN wILnun men, In,

REGULATION OF LYNN, )[ASSACIIVSE'FIS OF DYNAMOS.

SPECIFICATION forming part of Letters Patent- No. 397,613, dated February 12, 1889.

Application filed July 26, 1888. Serial No. 281,057. (No model.)

To all 207mm it may concern.-

Be it known that I, EDWIN WILBUn RIcE, Jr., a citizen of the IInited States, and a resident of Lynn, in the county of Essex and State of Massachusetts, have invented a certain new and useful Bank or Battery of Dy- I namo-Machines, of which the following is a specification.

My invention relates to a bank or battery I of dynamo-electric machines connected in multiple to supply-mains; and it consists in the improved arrangement hereinafter de-@ scribed, and more particularly specified in the claims.

In the accompanying drawings, Figures 1, 2, and 3 illustrate diagrammatically various arrangements, all embodying my invention.

The mains supplied by the dynamos in multiple are indicated at a 1).

Referring to Fig. l, A A indicate the armatures of dynamos, which are coupled to the mains so as to supply the same in multiple are, and D D indicate, respectively, the maincircuit coils for said dynamos. E is an equalizing-connection applied after the manner described in my Patent No. 328,253. Field exciting-coils of constant effect for each of said dynamos are indicated by the letter E. These exciting-coils of constant effect derive their current from a separate generator, G, which preferably has a field exciting-coil, H,

generator G.

In the arrangement illustrated in Fig. 1 the constant exciting-coils E of the dynamo are connected in multiple to distributing-wires fed by the generator G.

In Fig. 2 I have shown an extension of the bank or battery of dynamos to include a third dynamo whose armature is indicated at A and whose main-circu it coil is indicated at D The eqnalizing-connection E is correspondingly extended. The constant exciting-coils for the dynamos supplying the mains in multiple are fed, as in Fig. 1, from a separate source, G,

? having a field-coil, II, in shunt to the arma i ture.

In Fig. 13 another modification of the system is indicated. In this case the excitingcoils E, instead of being supplied in multiple,

l are placed in series with one another in a circuit from the separate generator G. The dyinamos have their armatures connected in i multiple, as before, to the mains through the field-coils I) D. The equalizing-connection E is applied. as in Fig. 1.

\Vhat I claim as my invention is l. The improved bank or battery of dynamos herein described, comprising two or more dynamos having their armatures connected in multiple arc to the mains through field exciting-coils, an equalizing connection or connections, E between the armature-circuits, and separate field exciting-coils E of constant eitect supplied from a common sep arate source, as described.

2. The improved bank or battery of dynamos herein described, comprising two or more dyna-mos having their armatures con nected in multiple to the main through exciting-coils, equalizing-connections between the armature-circuits, and separate field excitingcoils of constant effect supplied in multiple from wires fed by the separate generator.

- The improved bank or battery of dynamos herein described, comprising dynamoin derivation or shunt to them-mature of the I machines having their armatures connected in multiple to the mains through field exciting-coils D I), &c., an equalizing-connection, E between the armature-circuits, field exciting-coils E of constant effect for each dynamo, and a common supply-generator for the latter having a shunt-field, H, as described.

Signed at Lynn, in the county of Essex and State of Massachusetts, this 21st day of July, A. D. 1888.

E. WILBI'R RICE, JR. \Vitnesses:

J. W. GIBBONEY,

C M. MoREY. 

